U.S. patent number 10,641,026 [Application Number 16/017,629] was granted by the patent office on 2020-05-05 for automatic door stopping-closing device and door.
This patent grant is currently assigned to CMECH (GUANGZHOU) LTD.. The grantee listed for this patent is CMECH (GUANGZHOU) LTD.. Invention is credited to Jia Sen Qiu.
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United States Patent |
10,641,026 |
Qiu |
May 5, 2020 |
Automatic door stopping-closing device and door
Abstract
An automatic door stopping-closing device comprises a cylinder
with a connecting rod, one end of which is connected to a door; a
bracket assembly on the door frame, comprising a hook connected
with the other end of the rod, a movable lug cooperated with the
hook, and a pull rod cooperated with the movable lug, wherein the
pull rod and the hook can be engaged or disengaged. After the door
is opened, the door can be kept open securely through the
cooperation between the hook and the movable lug; and the door can
be closed automatically by a slight push, through the cooperation
between two of the hook, the movable lug and the pull rod. The
automatic door stopping-closing device holds the door open without
external force after the door is opened, and closes the door
automatically after a slight push.
Inventors: |
Qiu; Jia Sen (Guangzhou,
CN) |
Applicant: |
Name |
City |
State |
Country |
Type |
CMECH (GUANGZHOU) LTD. |
Guangzhou |
N/A |
CN |
|
|
Assignee: |
CMECH (GUANGZHOU) LTD.
(Guangdong, CN)
|
Family
ID: |
59170533 |
Appl.
No.: |
16/017,629 |
Filed: |
June 25, 2018 |
Prior Publication Data
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|
|
Document
Identifier |
Publication Date |
|
US 20180328092 A1 |
Nov 15, 2018 |
|
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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15594127 |
May 12, 2017 |
10006237 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E05F
3/22 (20130101); E05F 3/02 (20130101); E05C
17/30 (20130101); E05F 3/04 (20130101); E05F
5/027 (20130101); E05C 17/04 (20130101); E05F
3/221 (20130101); E05C 17/085 (20130101); E05C
17/305 (20130101); E05Y 2900/132 (20130101); E05B
15/0053 (20130101) |
Current International
Class: |
E05F
3/22 (20060101); E05F 5/02 (20060101); E05C
17/04 (20060101); E05F 3/04 (20060101); E05C
17/30 (20060101); E05C 17/08 (20060101); E05F
3/02 (20060101); E05B 15/00 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: O'Brien; Jeffrey
Attorney, Agent or Firm: McKee, Voorhees & Seas, PLC
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a Continuation Application of U.S. Ser. No. 15/594,127
filed May 12, 2017, which is herein incorporated by reference in
its entirety.
Claims
What is claimed is:
1. A door closer device for controlling closing of a door mounted
in a door frame, comprising: a cylinder pivotally mounted to the
door; a bracket fixed to the door frame; a rod with a first end in
the cylinder and a second end pivotally connected to the bracket,
and the connecting rod being extendable and retractable relative to
the cylinder; a lug pivotally mounted in the bracket for rotation
between a first position engaging the rod to hold the door open and
a second position disengaged from the rod to allow the door to
close; the lug being biased to the first position when the door is
closed and being rotatable in opposite directions from the first
position; and the lug is in the first position when the door is
closed and when the door is held open.
2. The door closer device of claim 1 further comprising a spring in
the bracket to bias the lug between the first and second
positions.
3. The door closer device of claim 1 wherein the lug pivots in a
first direction to engage the rod and pivots in an opposite second
direction to disengage the connecting rod.
4. The door closer device of claim 1 further comprising a pull rod
in the bracket slidable in one direction by the lug and slidable in
an opposite direction by the second end of the connecting rod.
5. The door closer device of claim 1 wherein the cylinder is
pneumatic.
6. The door closer device of claim 1 wherein the cylinder is
hydraulic.
7. The door closer device of claim 1 further comprising a slide
member in the bracket slidable between a first position disengaged
from the rod when the lug holds the door open and a second position
to rotate the lug to its second position.
8. The door closer device of claim 7 wherein the slide member is
moved to its second position by the rod.
9. The door closer device of claim 7 wherein the slide member is
moved to its first position by the lug.
10. A method of controlling positions of a hinged door, comprising:
extending a rod of a cylinder mounted to the door as the door
opens; then engaging a lug in a bracket on a frame surrounding the
door with an end of the extended rod to hold the door open at a
first distance without external force; opening the door a further
distance so as to disengage the rod from the lug; upon release of
the door from the further distance, retracting the rod to close the
door; wherein the lug rotates in a first direction from an initial
position when the door moves towards the first distance and rotates
in an opposite direction from the initial position when the door
moves to the further distance; and the lug is in the initial
position when the door is closed and when the door is held
open.
11. The method of claim 10 further comprising rotating the lug out
of engagement with the rod when the door is opened to the further
distance.
12. The method of claim 11 further comprising sliding a member in
the bracket when the door is opened to the further distance to
rotate the lug out of engagement with the rod.
13. The method of claim 10 further comprising biasing the lug
between rod engaging and disengaging positions.
Description
BACKGROUND OF THE INVENTION
In daily life, people will feel inconvenient when opening and
closing a door: firstly, a door won't remain open without external
force after it is opened, and people always block the door with
some supports to keep the door open, which is inconvenient and
affects the neatness and beauty; secondly, the door will be closed
only if people keeps driving the door to move by hand or a large
force is exerted, which is inconvenient or will cause noise
pollution.
At present, to solve the inconvenience of closing the door,
ordinary door closers are widely used. After the door is opened, it
can be closed automatically without an additional closing operation
of the user, thus it is timesaving convenient to the consumers. But
if the consumers need to go in and out for several times in a short
time, they must repeatedly open the door closed by the ordinary
door closer, thus it is timewasting and inconvenient. So, ordinary
door closers bring convenience to consumers as well as some
inconvenience at the same time, degrading the user experience.
Door closer devices having a hold open feature are known, primarily
for pneumatic door closers. However, these pneumatic door closers
continue to suffer from an undesirable "bounce" during closing.
Also, these pneumatic door closers utilize components that bite
into the rod of the closer, and through friction, hold the door
open. Hydraulic door closers are also known with a hold open
feature. One challenge with such hydraulic door closers is to
prevent physical contact with the closer rod. Thus, the rod must be
smooth and free of burrs for the hydraulic closer, otherwise, the
internal O-ring will wear down and eventually lose its seal, thus
causing a failure with the hydraulic closing system.
Chinese utility model patent with a publication number of
CN202501702U discloses an automatic stopping device comprising a
door body, and a lower part of the door body is configured with a
lower hinge, on which a rotating shaft and a door stop arched
upwards are configured. A gasket, configured with a rotating shaft
hole, is provided on a lower end face of the door body, and a
downward protrusion is located on one side of the rotating shaft
hole. The rotating shaft on the lower hinge passes through the
rotating shaft hole in the gasket. When the door is opening, the
downward protrusion of the gasket installed at the lower part of
the door collides with the upward arched door stop mounted on the
lower hinge. As the door stop is mounted obliquely, the protrusion
of the gasket on the door body will not bypass the door stop on the
lower hinge until the door is opened to a certain angle, and the
door is blocked by the door stop on the lower hinge when the door
is closing. Thus, the door can be kept open. However, the device is
unable to maintain the door open immovably as the door may keep
opening optionally. Meanwhile, some components of the device are
needed to be installed on the lower end face of the door, so a
space of the lower end face of the door will be required, bringing
limitations.
Accordingly, a primary objective of the present invention is the
provision of a door closer which overcomes the problems of the
prior art.
Another objective of the present invention is the provision of a
door closer with a hold open feature located on the jam
bracket.
A further objective of the present invention is the provision of a
hydraulic or pneumatic door closer having a hold open feature which
does not detrimentally affect the closer.
Still another objective of the present invention is the provision
of a hydraulic or pneumatic door closer which will retain the door
in an open position without biting into the closer rod.
Yet another objective of the present invention is the provision of
a door closer with a hold open function derived outside the closure
cylinder.
A further objective of the present invention is the provision of a
door closer having a hold open function, wherein the closer is
economical to manufacture, and durable and safe in use.
These and other objectives will become apparent from the following
description of the invention.
SUMMARY OF THE INVENTION
An aspect of the invention is to provide an automatic door
stopping-closing device on a door, in order to solve the above
problems. Thus, the door can be kept open without external force
after the door is opened, and the door can be closed automatically
by the device under a slight push to begin the door is closing.
The invention provides a technical solution as follows.
An automatic door stopping-closing device comprises:
a connecting rod, one end of which is connected to a door;
a bracket assembly configured on the door frame, the bracket having
a hook connected with the other end of the connecting rod, a
movable lug cooperated with the hook, and a pull rod cooperated
with the movable lug, wherein the pull rod and the hook can be
separated or connected;
when the door is opening, the connecting rod drives the hook to
move clockwise under external force, whereby the hook comes in
contact with the movable lug and drives the movable lug to rotate
counterclockwise; when the movable lug rotates to its limit
position, the external force will disappear; then the movable lug
will rotate clockwise to its stop position under a first reset
force, whereby the hook is locked by the movable lug, and the door
is stopped and held in a lockout or open condition;
when the door is closing, the connecting rod drives the hook to
further move clockwise under external force, whereby the hook comes
in contact with the pull rod and drives the pull rod to slide
leftwards; the pull rod further drives the movable lug to rotate
clockwise, whereby the movable lug and the hook are apart from each
other and are unlocked; after the movable lug and the hook are
unlocked, the external force will disappear, and then the
connecting rod drives the hook to rotate counterclockwise under a
door-closing force, making the hook come in contact with the
movable lug and further drive the movable lug to rotate clockwise,
until the hook and the movable lug are apart from each other; after
the hook and the movable lug are separated, the hook keeps rotating
counterclockwise under a door-closing force, and the movable lug
rotates counterclockwise to its initial position under a second
reset force;
the first reset force and the second reset force are in opposite
directions.
In some embodiments, the hook is configured with a first hook tooth
cooperated with the movable lug and a second hook tooth cooperated
with the pull rod.
In some embodiments, the moveable lug is configured with a first
lug tooth cooperated with the hook and a second lug tooth
cooperated with the pull rod.
In some embodiments, a torsional spring is configured in the
moveable lug, and the first reset force and the second reset force
are the reset force of the torsional spring.
In some embodiments, the pull rod is configured with a first
protrusion cooperated with the hook and a second protrusion
cooperated with the moveable lug.
Further, the pull rod is in a long strip shape, and the first
protrusion and the second protrusion are configured at the two ends
of the pull rod, respectively.
In some embodiments, the bracket assembly further comprises a
housing in which the hook, the movable lug and the pull rod are
located.
In some embodiments, a dowel pin is configured in the hook and a
dowel pin hole matched with the dowel pin is configured in the
housing; when the movable lug rotates to its limit position, a
crash will be generated since the dowel pin bumps into the dowel
pin hole.
Further, the dowel pin comprises a fixing ring, a pin body
configured in the fixing ring and a spring configured in the pin
body.
In some embodiments, the housing is provided with an espagnolette
which extends through the housing for fastening.
In some embodiments, the connecting rod is connected with the door
by a hinge.
In some embodiments, the bracket assembly also comprises an
extension sheet where a number of screw holes are provided. The
screw holes are configured to be fixed to the door frame in
cooperation with self-tapping screws.
In addition, the present invention also provides a door configured
with an automatic door stopping-closing device.
The technical solution of this invention has following
benefits:
With the automatic door hold open or stopping and closing device
and door of the present invention, the door can be kept open
securely without external force after the door is opened, and the
door can be closed automatically just by a slight push without
manually driving the door to move by hand when the door is closing.
In addition, the automatic door stopping-closing device of the
present invention is easy to disassemble and assemble.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is further illustrated with reference to accompanying
figures.
FIG. 1 is an assembly plan view of an automatic door-stopping and
closing device of an embodiment of the invention when the door is
closed.
FIG. 2 is a perspective view of an automatic door stopping and
closing device of an embodiment of the invention.
FIG. 3 is an exploded view of the bracket assembly of an automatic
door stopping and closing device of an embodiment of the
invention.
FIG. 4 is a traverse sectional view of the bracket assembly of an
automatic door stopping and closing device of an embodiment of the
invention.
FIG. 5 is a longitudinal sectional view of the bracket assembly of
an automatic door stopping and closing device of an embodiment of
the invention.
FIG. 6 is an enlarged sectional view from FIG. 5 of the dowel pin
of an automatic door stopping and closing device of an embodiment
of the invention.
FIG. 7 is a transverse sectional view of the bracket assembly of an
automatic door stopping and closing device of an embodiment of the
invention when the door is closed.
FIG. 8 is a transverse sectional of the bracket assembly of an
automatic door stopping and closing device of an embodiment of the
invention when the door is opening;
FIG. 9 is a transverse sectional view of the bracket assembly of an
automatic door stopping and closing device of an embodiment of the
invention when the door is stopped in a hold open position.
FIG. 10 is an assembly diagram of an automatic door stopping and
closing device of an embodiment of the invention when the door is
stopped.
FIG. 11 is a transverse sectional view of the bracket assembly of
an automatic door stopping and closing device of an embodiment of
the invention in Step 1 of door closing.
FIG. 12 is a transverse sectional view of the bracket assembly of
an automatic door stopping and closing device of an embodiment of
the invention in Step 2 of door closing.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In order to fully understand the purposes, features and effects of
the invention, the designs, specific structures and the achieved
effects of the invention are further explained with reference to
the accompanying figures.
As shown in FIGS. 1, 2 and 3, the automatic door stopping and
closing device of this embodiment comprises a cylinder 10 with an
extendible and retractable connecting rod 1, one end of which is
connected to a door 11; and bracket assembly 2 which is configured
on a door frame 12 and comprises a hook 230 connected with the
other end of the connecting rod 1, a movable lug 240 cooperated
with the hook 230, a pull rod 220 cooperated with the movable lug
240, wherein the pull rod 220 and the hook 230 can be separated or
connected. The cylinder 10 and rod assembly may be hydraulic or
pneumatic.
When the door is opening, the connecting rod 1 drives the hook 230
to move clockwise under external force, thereby the hook 230 comes
in contact with the movable lug 240 and drives the movable lug 240
to rotate counterclockwise, as shown in FIGS. 7 and 8. When the
movable lug 240 rotates to its limit position, the external force
will disappear. Then the movable lug 240 will rotate clockwise to
its stop position (FIG. 9) under a first reset force, whereby the
hook 230 is locked by the movable lug 240, and the door is stopped
and held open in a lockout condition.
In order to close the door from the hold-open position, the door is
opened slightly further, such that the connecting rod 1 drives the
hook 230 to further move clockwise under external force, whereby
the hook 230 comes in contact with the pull rod 220 and drives the
pull rod 220 to slide leftwards, as shown in FIG. 11. Further, the
pull rod 220 drives the movable lug 240 to rotate clockwise,
thereby the movable lug 240 and the hook 230 are disengaged from
each other and are unlocked. After the movable lug 240 and the hook
230 are unlocked, the external force will disappear, and then the
connecting rod 1 drives the hook 230 to rotate counterclockwise
under a door-closing force, making the hook 230 come in contact
with the movable lug 240 and further drive the movable lug 240 to
rotate clockwise until the hook 230 and the movable lug 240 are
spaced apart from each other. After the hook 230 and the movable
lug 240 are separated (FIG. 11), the hook 230 can rotate
counterclockwise under the door-closing force (FIG. 12), and the
movable lug 240 rotates counterclockwise to its initial position
under a second reset force.
The first reset force and the second reset force are in opposite
directions.
As shown in FIGS. 4, 5 and 6, the hook 230 is configured with a
first hook tooth 231 cooperated with the movable lug 240 and a
second hook tooth 232 cooperated with the pull rod 220. The movable
lug 240 is configured with a first lug tooth 241 cooperated with
the hook 230 and a second lug tooth 242 cooperated with the pull
rod 220. A torsional spring 243 is configured in the movable lug
240, and the first reset force and the second reset force are the
reset force of the torsional spring 243. The pull rod 220 is
configured with a first protrusion 221 cooperated with the movable
lug 240 and a second protrusion 222 cooperated with the hook 230.
The pull rod 220 is in a long strip shape, and the first protrusion
221 and the second protrusion 222 are configured at the two ends of
the pull rod 220 respectively.
The bracket assembly 2 also comprises a housing 210, and the hook
230, the movable lug 240 and the pull rod 220 are located therein.
A dowel pin 250 is configured in the hook 230 and a dowel pin hole
211 matched with the dowel pin 250 is configured in the housing
210. The dowel pin 250 comprises a fixing ring 253, a pin body 252
configured in the fixing ring 253 and a spring 251 configured in
the pin body 252. When the movable lug 240 rotates to its limit
position, the dowel pin body 252 sets into the dowel pin hole 211
(FIG. 6).
The housing 210 is preferably configured with an espagnolette 9
which extends through the housing for fastening.
The connecting rod 1 is preferably connected with the door by a
hinge 3.
The bracket assembly 2 preferably comprises an extension sheet 4
where a number of screw holes 410 are provided. The screw holes 410
are configured to be fixed to the door frame in cooperation with
self-tapping screws 5.
The automatic door stopping-closing device of the embodiment
operates as follows.
FIG. 1 and FIG. 7 shows the automatic door stopping-closing device
of the embodiment when the door 11 is closed wherein the hook 230
and the movable lug 240 are apart from each other and the movable
lug 240 is in its initial position.
FIG. 8 shows the automatic door stopping-closing device of the
embodiment when the door 11 is opening, wherein the connecting rod
1 rotates in a direction indicated by the arrow shown in the
figure, and the connecting rod 1 drives the hook 230 of the bracket
assembly 2 to move clockwise, whereby the first hook tooth 231
comes in contact with the first lug tooth 241, and further drives
the movable lug 240 to rotate counterclockwise until the movable
lug 240 rotates to its limit position. Meanwhile, as shown in FIG.
6, the pin body 252 of the dowel pin 250 will be pressed into the
dowel pin hole 211 by the spring 251 and cause a sound which remind
the user to stop pushing the door. As shown in FIG. 9, the movable
lug 240 in its limit position is driven by the first reset force
offered by the torsional spring 243 and rotates clockwise to its
stop position, whereby the first hook tooth 231 of the hook 230
will be locked as the first lug tooth 241 of the movable lug 240
bears against it, thus a function of stopping and holding the door
open is achieved.
As shown in FIG. 10 and FIG. 11, when the door is further pushed to
its limit after the door is stopped, in the automatic door
stopping-closing device of the embodiment, the connecting rod 1
rotates and drives the hook 230 to rotate, thereby the second hook
tooth 232 of the hook 230 comes in contact with the second
protrusion 222 of the pull rod 220, and further drives the pull rod
220 to slide in a direction indicated by the arrow shown in the
figure. The first protrusion 221 of the pull rod 220 comes in
contact with the second lug tooth 242 of the movable lug 240 and
further drives the movable lug 240 to rotate counterclockwise,
whereby the hook 230 and the movable lug 240 are moved apart from
each other and unlocked. Step 1 of door closing is completed.
As shown in FIG. 12, the door 11 will be closed automatically when
the user no longer pushes the door. The connecting rod 1 rotates
and drives the hook 230 to rotate counterclockwise, thereby the
first hook tooth 231 comes in contact with the first lug tooth 241
and further drives the movable lug 240 to rotate clockwise as
indicated by the arrow in the figure until the hook 230 and the
movable lug 240 are moved apart from each other. At that moment,
the movable lug 240 rotates counterclockwise to its initial
position under the second reset force offered by the torsional
spring 243. Meanwhile, as the hook 230 rotates counterclockwise to
a position where the hook 230 is located when the door is closed,
the spring 251 of the dowel pin 250 returns and the pin body 252
leaves the dowel pin hole 211. Step 2 of door closing is completed.
At that time, the bracket assembly 2 has a same inner structure
with FIG. 7, and the function of closing a door automatically when
the door is open is achieved.
The above contents illustrate a completed working cycle of stopping
and closing the door for the automatic door stopping-closing device
of the present embodiment. The automatic door stopping-closing
device enables a stable and effective automatic door
stopping-closing.
Those described above are just some preferred embodiments of the
invention, instead of any formal restrictions of the invention.
Therefore, any simple amendments, equivalent variants and
modifications to above embodiments according to the technical
essence of the present invention, without departing from the
technical solution of the present invention, still fall in the
technical scope of the technical solution of the present
invention.
* * * * *